Chipping-machine.



PATENTED MAR. 26, 1907.

G. -E. GRANT.

GHIPPING MACHINE.

APPLICATION FILED AUG.20.1906.

CHARLES E. GRANT, or ALLENDALE, CALIFORNIA.

CHEPPlNG-MACHINE.

Specification of Letters Patent.

' Patented march 26, 1907.

Application filed August 20, 1906. Serial No. 331,297.

provements in Chipping Machines, of which the following is a specification.

.My invention relates to devices for chipping rust and' hard scale from the-sides of vessels, bridges, iron girders, columns, and the like. Its object is to provide a sim le practical pneumatic tool of this character y chippers 2.

torily and quickly than heretofore.

which the work can be done more satislf ilcs object is accom lished by the use of a tool having a plura ity of independently-cushioned teeth orlchippers, eac having a limited movement independent of the others, whereby the tool is adapted to fit the unevenness of the surface worked on, being adapted to work equally well in holes, crevices in the corners of angle-irons, and over and around rivets and bolt-heads as over plain surfaces. 1 I

The invention consists of the parts and the construction and combination of parts, as hereinafter morefully explained, having ref-- erence to the accompanying drawings, which- Figure 1 is a perspective view of the tool; Fig. 2, a vertical longitudinal section through the holder.

Referring to Fig. 1, E represents an engine, herein shown as of the usual hand-tool pneumatic type, and A is-a head or holder forthe ened steel, about half an inch square in crosssection, and are pointed or Wedge-shaped at their outer ends, as shown. The chippers are arranged to lie close together and are suitably cushioned at their inner ends insuch fashion that each chipper may have a li'1n ited movement independent of all the other chippers in order to adapt the tool to the va-' r ous unevennesses of the surface to be worked over.

As here shown, the inside of the hold'erhas I a series of sockets to receive the corresponding inner ends of the chippers, and each-chip-J per has a turned-down portion to accommo-. date a helical spring 3, which. has one end bearing against a shoulder on the chi per and the other end against the bottom 0 the holder.

The -chippers are held in place by means of the keys 4, one key being passed transversely These chippers are of case-hardbetween two adjacent rows of-chippers, the chippersin the two rows being channeled on their adjacent sides to receive a key and to permit of the-necessary independentreciprocation of thelchippers.

In actual practice I usually make the head about two and one-half by three and one-half inches outside measurement and employ, say, four rows of chippers with six chippers in a row, all the chippers-' normallystanding viith their outer cutting edges in the same p ane.

' A handhold 6 of some appropriate form is attached to one side of the holder, while the back of the holder is swivelly connected to a rod or stem 7, which fits in the. pneumatic calker or other engine employedto impart a and the front end of the stem 7 fits this socket and has an annular groove 7 to receive the inner end of a screw parts swivelly in contact.

The operator usually grasps the handle 6 by one hand and the engine by the other and directs the tool over the surface or article to l) to. retain the be chipped. Thev swivel mounting of the holder on the stem allows the tool to be easily directed inany way desired; The independent cushioning of each chipper on its spring 3 and the allowance for independent reciprocation of each chipper permits the tool to work over a bolt-head or rivet or into any angles or holes and to reach into all crevices and thoroughly clean the article in a 'much better manner and in a much shorter time than the same could be 'done by hand or by the use of asingle chipping member.

Having thus described my lnvention, what I claim, and desireto secure b'y Letters Patent, is F -1. In a .,chippin'g-.machine,p.the c'ombination with a unitary head ofa series of chippers having rear portions incased in the head, said chippers being in contiguous relation ICO and having reduced inner ends, said head having sockets fori'the reduced ends of'jthe c i pers, prings on the rediicedends of the i chippers and operating to maintain the cutting edges of the chippers in substantially the same plane, said chippers having channels through them and keys 'passing through the 1 channels and allowing the chippers independent reciprocation, .and means for operating the chippers in unison in the same direction.

2. In a chipping-machine the combina tion with a unitary head of a plurality of I hand-tool, of a head and means whereby it is 5 i swivelly' connected therewith and provided spring-pressed chippers slidably mounted therein, said chippers having channels in their adjacent'sides, keys passing through said head and channels whereby the chippers are allowed an independent reciprocation,

Y, and means for operating the chippers.

3. The combination with a pneumatic hand-tool, of a head connectedtherewith,

a plurality of spring-pressed chippers slidably mounted in'the head, and means whereby each of said chippers is capable of a limited independent movementv 4. The combination with a pneumatic i with spring-pressed chippers, means wherei by said chippers are allowed alimited independent movement in the head, and a hand- 1 hold by which the chippers are directed over the surface to be cleaned.

E In testimony whereof I have hereunto set v my hand in presence of two subscribing witnesses.

CHARLES E. GRANT. Witnesses:

S. H. NoURsE,

i C. BuCRAWFORD. 

